Shower tray



FIG. 1 is a bottom plan view of a shower tray showing my new design;

FIG. 2 is a top, rear perspective view thereof;

FIG. 3 is a bottom, front perspective view thereof; and,

FIG. 4 is a top plan view thereof.

The broken-line disclosure of the apertures in the article are understood to be for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a shower tray, as shown and described. 